Sx48dip
Guenther Daubach
Posts: 1,321
Hi all,
here it is - another SX48 carrier board. I have presented this design in one of the other threads before, but it took me a while to finally get my design manufactured.
This carrier board does only come with the SX48 and two 100nF filter caps between Vdd and Vss and no other components, like a resonator, an EEPROM, the SX-Key header pins etc. I have designed this board to be able using an SX48 together with a plated-through "main board" with a standard DIL-48 Socket for the SX48DIP, so all support components, like the resonator, the SX-Key header pins, etc. are supposed to be located on the "main board".
In order to minimize EMI, the carrier board has ground planes whereever possible on both sides, two filter caps, and to minimize the length of the OSC1 and OCS2 traces, I have changed pin assignments, i.e. the pin numbers on the carrier board do not match the original SX48 pins.
The attached picture shows the "plain" SX48DIP board at the bottom. In the middle, there is an SX48DIP board with small header pins (0.45mm diameter) installed that can be inserted into a standard DIL48 socket. At the top, I have placed a board with standard header pins (0.65 by 0.65 mm) that would fit into two rows of standard 24-pole header sockets.
Although I have cut off the header pins extending out of the board on the solder side for this picture, it may be an idea to keep them during the prototype phase as they nicely allow you to clip on test probes.
As all original SX48 pins are made available on the SX48DIP board, there are four Vss and four Vdd pins. For minimizing EMI, I recommend that all supply pins are connected to the Vdd and Vss potentials on the "main board" (although they are already tied together on the carrier board), and that additional filter caps are also placed on the "main board", close to the four pairs of Vdd and Vss pins.
As you may guess from the picture, I did not hand-solder the SX48 and the caps. Instead, I had a professional manufacturer with and automated pick-place-and-solder facility do the job.
Based upon the initial number of boards I have on hand right now, a single SX48DIP board (with the SX48 and the two filter caps, but without header pins) would cost US$ 19.00 including shipping from Germany. In case, there is a greater demand from the US, I can arrange shipping the boards through my daughter in the future at a reduced price. Since last week (after her marriage), she is now a permanent US resident in Georgetown, SC.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Greetings from Germany,
G
here it is - another SX48 carrier board. I have presented this design in one of the other threads before, but it took me a while to finally get my design manufactured.
This carrier board does only come with the SX48 and two 100nF filter caps between Vdd and Vss and no other components, like a resonator, an EEPROM, the SX-Key header pins etc. I have designed this board to be able using an SX48 together with a plated-through "main board" with a standard DIL-48 Socket for the SX48DIP, so all support components, like the resonator, the SX-Key header pins, etc. are supposed to be located on the "main board".
In order to minimize EMI, the carrier board has ground planes whereever possible on both sides, two filter caps, and to minimize the length of the OSC1 and OCS2 traces, I have changed pin assignments, i.e. the pin numbers on the carrier board do not match the original SX48 pins.
The attached picture shows the "plain" SX48DIP board at the bottom. In the middle, there is an SX48DIP board with small header pins (0.45mm diameter) installed that can be inserted into a standard DIL48 socket. At the top, I have placed a board with standard header pins (0.65 by 0.65 mm) that would fit into two rows of standard 24-pole header sockets.
Although I have cut off the header pins extending out of the board on the solder side for this picture, it may be an idea to keep them during the prototype phase as they nicely allow you to clip on test probes.
As all original SX48 pins are made available on the SX48DIP board, there are four Vss and four Vdd pins. For minimizing EMI, I recommend that all supply pins are connected to the Vdd and Vss potentials on the "main board" (although they are already tied together on the carrier board), and that additional filter caps are also placed on the "main board", close to the four pairs of Vdd and Vss pins.
As you may guess from the picture, I did not hand-solder the SX48 and the caps. Instead, I had a professional manufacturer with and automated pick-place-and-solder facility do the job.
Based upon the initial number of boards I have on hand right now, a single SX48DIP board (with the SX48 and the two filter caps, but without header pins) would cost US$ 19.00 including shipping from Germany. In case, there is a greater demand from the US, I can arrange shipping the boards through my daughter in the future at a reduced price. Since last week (after her marriage), she is now a permanent US resident in Georgetown, SC.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Greetings from Germany,
G
3216 x 1695 - 264K
Comments
Yep - I do.
As I don't want to use this forum as a sales platform, please contact me via g.daubach@mda-burscheid.de for the details.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Greetings from Germany,
G
tommy
I agree with you - I personaly feel much more comfortable with 1/10 inch devices - no need for magnifying glasses and some extra drinks to calm-down the hands for soldering
As a matter of fact, when testing the SX48DIP module, I found out that I had designed in a feature just by accident, without having it in mind when drawing the layout. Look at the attached picture showing the board section around the OSC pins: The order of OSC1, OSC2, Vdd, and Vss exactly matches the SX-Key/Blitz pin order. This means, you can easily attach a 4-pin header at the component side of the PCB for programming/debugging the module.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Greetings from Germany,
G
Well, since you take Pay-pal, how much are you selling hefeweizen for?
for one of my first eBay deals, I sent some cans of beer as payment to the seller living in Germantown, somewhere in the US because he asked me to do this (his feedback was: "Quick payment in beer"). Unfortunately, due to government regulations, beer is sold in Germany almost only in glass or plastic bottles now but no longer in cans. This makes it a bit more complicated shipping Hefeweizen (Paulaner, Erdinger, Weihenstephan Franziskaner - to mention just some) to the US.
Sorry for such bad news. So you either will have to stay with Heineken, Coors, Budweiser, etc., pay for extra packaging cost, or come and visit Germany. In the latter case, I promise your first beer will be on me
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Greetings from Germany,
G
In 1990 I had the opportunity to spend 6 weeks (Sep-Oct) in Stuttgart courtesy of the the US government, and left more than a few pounds heavier than when I arrived.